diff --git a/pkgs/development/python-modules/abjad/default.nix b/pkgs/development/python-modules/abjad/default.nix
index 9ff530afdf741..b0998b8c0693a 100644
--- a/pkgs/development/python-modules/abjad/default.nix
+++ b/pkgs/development/python-modules/abjad/default.nix
@@ -8,6 +8,7 @@
   pythonOlder,
   pytestCheckHook,
   lilypond,
+  typing-extensions,
 }:
 
 buildPythonPackage rec {
@@ -26,6 +27,7 @@ buildPythonPackage rec {
     ply
     roman
     uqbar
+    typing-extensions
   ];
 
   buildInputs = [ lilypond ];
@@ -34,12 +36,12 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace abjad/io.py \
-      --replace 'lilypond_path = self.get_lilypond_path()' \
+      --replace-fail 'lilypond_path = self.get_lilypond_path()' \
                 'lilypond_path = "${lilypond}/bin/lilypond"'
     # general invocations of binary for IO purposes
 
     substituteInPlace abjad/configuration.py \
-      --replace '["lilypond"' '["${lilypond}/bin/lilypond"'
+      --replace-fail '["lilypond"' '["${lilypond}/bin/lilypond"'
     # get_lilypond_version_string
   '';